SU1588557A1 - Lower pusher for crank vertical press - Google Patents

Abstract

The invention relates to forging equipment. The purpose of the invention is to improve the reliability and degree of automation of removal of forgings. The articulation of the pusher 10 is made with the crosshead 2 in the form of a two-stage hydraulic cylinder with the upper 6 and lower stages and two plungers 4 and 5 of different diameters. The distances between the holes 9 and 11, as well as the holes 11 and 12, are determined by the dependence 0.1 / B / A 0 0.5, where A is the distance between the holes 9 and 12

B — distance between holes 11 and 12. 2 Il.

Description

711

/

3 chae

12

V4

/ J

14

01

00

oo

JV JV

; The invention relates to the field of machine construction, in particular to the design of bodywork: non-press equipment.

The purpose of the invention is to increase the reliability and degree of automation in the removal of forgings.

FIG. 1 shows the structural scheme of the proposed ejector; in fig. 2 - ejector.

The pusher includes a pusher 1, a cam-lever drive movement; pusher 1 connected to a fresh-ca; Ca drive (not shown), as well as a link of a pusher 1 with a corresponding element of a cam-lever actuator, complete in the form of a cross beam 2 with drafts 3. The mentioned link is made in the form of two - a stepped hydraulic cylinder with two plun-: with 4 and 5 different diameters, large - in the upper stage 6 and less: - in the lower stage 7, as well as hydraulic-: roller 8.

In each step 6 and 7, a pair of holes 9, 10 and 11, 1.2 are made to connect the hydrolines 8, which connect: the cavities of steps 6 and 7. Plunger 5 is articulated with crossmember 2. The distance between the hole mi 9 and 11, as well as 11 and 12

and

are determined by the dependence 0,, 5, where A is the distance between the holes 9 and 11 of the upper 6 and lower 7 steps; B - the distance between the openings 11 and 12 of the lower stage 7. In the hydraulic lines 8, a check valve 13 and a safety valve 14 are mounted. A drain of the liquid from the hydraulic lines 8 is made into the tank 15.

The ejector works as follows.

Moving down the slider of the roll (not shown), the rods 3 and the yoke 2 also move down, since the yoke 2 is pivotally connected to the plunger 5, the latter also moves down and forces the liquid out of the cavity of the lower stage 7 into the drain tank 15, creating in the cavity above the plunger 5 vacuum. The plunger 4 of the upper stage 6 is also lowered. When plunger 5 opens openings 12, due to vacuum, non-return valve 13 opens and fluid will flow into the cavity of lower stage 7 above plunger 5. As t 3 r moves together with cross-beam 2, upward movement will start and plunger 5 will close by increasing the pressure of the fluid, closing the check valve 13. The increased pressure of the fluid acts on the plunger 4, raising it and simultaneously overcoming

resistance of the pusher 10. When the upper position is reached, the plunger 4 opens in the cavity of the upper stage 6 a discharge channel for the fluid and its excess is displaced into the drain tank 15.

In case of incorrect adjustment of the shtampa (not shown) or jamming of the pusher 10, the safety valve 14 is actuated, which is set to a certain

Q is the fluid pressure proportional to the limiting value of the ejection force. This ensures overload protection, eliminates breakage of the pusher 10, and the need to use brittle fuses. The plunger 4 continues to move upward and at the end of the stroke connects the upper cavity of the upper stage 6 with the lower one, which ensures pressure relief. The movement continues until the arrival of the slide in the highest position. Moving the press ram downward repeats the cycle.

Thus, the technical and economic effect of the introduction of the proposed device in comparison with the known is provided by increasing the reliability

.5 and the degree of automation for the removal of forgings.

Claims (1)

Invention Formula A lower ejector of a crank vertical press containing a pusher, a cam-lever drive for moving a pusher coupled to a press drive, and also a link for joining the pusher with a corresponding element of the cam-lever drive for its movement, characterized in that, in order to increase 5 reliability and degree of automation of removal of forgings, the mentioned link is made in the form of a two-stage hydraulic cylinder with a housing and two plungers of different diameters, a large one in the upper stage and a smaller one in the lower stage, as well as controlled hydraulic lines, a pair of holes for each stage of the body are made connecting the hydrolines and connecting the cavities of both stages to each other, the lower stage plunger is articulated 5 with a cam-lever drive element, and the plunger of the upper stage is arranged to interact with the pusher, with the distances between the holes being determined by the relation 0, 5, 0 where A is the distance between the upper orifices of the upper and lower stages; B is the distance between the holes of the lower step. 0